Home » Public Forums » GMCnet » [GMCnet] Furnace Issues...
|
|
| Re: [GMCnet] Furnace Issues... [message #166177 is a reply to message #166174] |
Thu, 12 April 2012 21:06   |
 |
mike miller
Messages: 3576
Registered: February 2004
Location: Hillsboro, Oregon
Karma: 0
|
Senior Member |
|
|
| Kelvin Dietz wrote on Thu, 12 April 2012 18:38 |
...
What say you with more experience? I don't really want to replace a
furnace but should I be running this?
And there's also a valve on top of the furnace to shut off the gas to it.
http://www.gmcmhphotos.com/photos/showfull.php?photo=43845
An OEM thing or something a PO has added? It sure seems an odd thing
since the Fridge and Water heater don't have a shut-off valve ...
|
Pretty rough looking heat exchanger. I wouldn't trust it with my wife and kids... or even my own life.
From the looks of the case, I suspect it is original to the coach. Here is the case installed in my 1973:
<http://www.gmcmhphotos.com/photos/showphoto.php?photo=11240>
If it is original it has provided good service for MUCH longer than it was designed for. Give it a good burial and install a new one. They still make them that are close to the same size and shape.
I do not understand how the valve made it on top an original furnace. The PO of my 1973 (or his worker) put in an extension to connect the gas line to a new furnace. It was on the other side.
Mike Miller -- Hillsboro, OR -- on the Black list
(#2)`78 23' Birchaven Rear Bath -- (#3)`77 23' Birchaven Side Bath
More Sidekicks than GMC's and a late model Malibu called 'Boo'
http://m000035.blogspot.com
|
|
|
|
| Re: [GMCnet] Furnace Issues... [message #166179 is a reply to message #166174] |
Thu, 12 April 2012 21:10 |
Dennis S
Messages: 3046
Registered: November 2005
Karma: 2
|
Senior Member |
|
|
Kelvin,
Regarding the shut-off valve -- OEM as my 73, 23 ft has one as well.
Dennis
| Kelvin Dietz wrote on Thu, 12 April 2012 20:38 |
Hey guys...
I haven't been this far into my "galley" for 7 years and I've never dug
this deep. I have a gas leak (which I did find) but while I was at it I
took some other stuff apart for the first time. Namely the furnace.
So I have holes in the furnace. Not knowing how thing beast really
works I have no idea if these are dangerous or not. Been using it since
2002 and there have been no explosions and I've never has a CO alarm go
off, either.
http://www.gmcmhphotos.com/photos/showfull.php?photo=43844
http://www.gmcmhphotos.com/photos/showfull.php?photo=43843
What say you with more experience? I don't really want to replace a
furnace but should I be running this?
And there's also a valve on top of the furnace to shut off the gas to it.
http://www.gmcmhphotos.com/photos/showfull.php?photo=43845
An OEM thing or something a PO has added? It sure seems an odd thing
since the Fridge and Water heater don't have a shut-off valve but I have
no clue.
Thanks in advance,
Kelvin
'73 23' in Eugene, OR
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
Dennis S
73 Painted Desert 230
Memphis TN Metro
|
|
|
|
| Re: [GMCnet] Furnace Issues... [message #166180 is a reply to message #166174] |
Thu, 12 April 2012 21:11 |
sgltrac
Messages: 2797
Registered: April 2011
Karma: 1
|
Senior Member |
|
|
If those are holes in your furnace burner I would definitely replace the burner. Or buy another furnace whichever makes the most sense. That could pose a health hazard.
Silly
77 royale
Sent from my iPhone
On Apr 12, 2012, at 6:38 PM, Kelvin Dietz <kelvin@datsuns.com> wrote:
> Hey guys...
>
> I haven't been this far into my "galley" for 7 years and I've never dug
> this deep. I have a gas leak (which I did find) but while I was at it I
> took some other stuff apart for the first time. Namely the furnace.
>
> So I have holes in the furnace. Not knowing how thing beast really
> works I have no idea if these are dangerous or not. Been using it since
> 2002 and there have been no explosions and I've never has a CO alarm go
> off, either.
>
> http://www.gmcmhphotos.com/photos/showfull.php?photo=43844
> http://www.gmcmhphotos.com/photos/showfull.php?photo=43843
>
> What say you with more experience? I don't really want to replace a
> furnace but should I be running this?
>
> And there's also a valve on top of the furnace to shut off the gas to it.
> http://www.gmcmhphotos.com/photos/showfull.php?photo=43845
>
> An OEM thing or something a PO has added? It sure seems an odd thing
> since the Fridge and Water heater don't have a shut-off valve but I have
> no clue.
>
> Thanks in advance,
> Kelvin
> '73 23' in Eugene, OR
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Sully
77 Royale basket case.
Future motorhome land speed record holder(bucket list)
Seattle, Wa.
|
|
|
|
|
|
| Re: [GMCnet] Furnace Issues... [message #166187 is a reply to message #166184] |
Thu, 12 April 2012 21:56 |
sgltrac
Messages: 2797
Registered: April 2011
Karma: 1
|
Senior Member |
|
|
That is the combustion chamber. Throw it away.
Sully
77 royale
Sent from my iPhone
On Apr 12, 2012, at 7:44 PM, Kelvin Dietz <kelvin@datsuns.com> wrote:
> On 4/12/2012 7:06 PM, Mike Miller wrote:
>>
>> Kelvin Dietz wrote on Thu, 12 April 2012 18:38
>>> ...
>>> What say you with more experience? I don't really want to replace a
>>> furnace but should I be running this?
>>>
>>> And there's also a valve on top of the furnace to shut off the gas to it.
>>> http://www.gmcmhphotos.com/photos/showfull.php?photo=43845
>>>
>>> An OEM thing or something a PO has added? It sure seems an odd thing
>>> since the Fridge and Water heater don't have a shut-off valve ...
>>
>> Pretty rough looking heat exchanger. I wouldn't trust it with my wife and kids... or even my own life.
>>
>>> From the looks of the case, I suspect it is original to the coach. Here is the case installed in my 1973:
>>
>> <http://www.gmcmhphotos.com/photos/showphoto.php?photo=11240>
>>
>> If it is original it has provided good service for MUCH longer than it was designed for. Give it a good burial and install a new one. They still make them that are close to the same size and shape.
>>
>> I do not understand how the valve made it on top an original furnace. The PO of my 1973 (or his worker) put in an extension to connect the gas line to a new furnace. It was on the other side.
>
> How does this thing work? Isn't it must warm air in most of those
> cavities? So if some air gets out why is that a problem?
>
> I understand the manufacturer didn't put holes in there so they can't be
> a great thing, but we don't really notice any odd odors and like I said,
> the CO alarms have never gone off. Where is the danger? Mostly like
> I'll replace the unit but I am curious.
>
> Anyone have a source for a good replacement? I'm sure the info is out
> there somewhere. I probably should check Gene's site before even
> asking, but I typed all this, I'm gonna send it...
>
> Kelvin
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Sully
77 Royale basket case.
Future motorhome land speed record holder(bucket list)
Seattle, Wa.
|
|
|
|
| Re: [GMCnet] Furnace Issues... [message #166204 is a reply to message #166174] |
Thu, 12 April 2012 23:35 |
zhagrieb
Messages: 676
Registered: August 2009
Location: Portland Oregon
Karma: 0
|
Senior Member |
|
|
Run, do not walk, to the new furnace store. Those are rust holes that will allow combustion gas (read CO-2) into the coach. I wouldn't even try to repair it, the manufacturer will no longer support it..
Glenn Giere, Portland OR, K7GAG
'73 "Moby the Motorhome" 26'
|
|
|
|
| Re: [GMCnet] Furnace Issues... [message #166206 is a reply to message #166204] |
Thu, 12 April 2012 23:55 |
Bruce Hart
Messages: 1501
Registered: October 2011
Location: La Grange, Wyoming
Karma: 5
|
Senior Member |
|
|
PPL in Huston has this furnace that will all but match the one you have.
http://www.pplmotorhomes.com/parts/suburban-rv-furnaces-suburban-atwood-parts.htm
Model 79-1815 is a 19,000 BTU unit for $507.49.
Be sure to to get one that states ducted furnace.
You might call around RV service venders as sometimes replace good working
units.
ttp://
www.pplmotorhomes.com/parts/suburban-rv-furnaces-suburban-atwood-parts.htm
On Thu, Apr 12, 2012 at 10:35 PM, Glenn Giere <glenngiere@gmail.com> wrote:
>
>
> Run, do not walk, to the new furnace store. Those are rust holes that
> will allow combustion gas (read CO-2) into the coach. I wouldn't even try
> to repair it, the manufacturer will no longer support it..
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Bruce Hart
1976 Palm Beach
Milliken, Co
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Bruce Hart
1976 Palm Beach
1977 28' Kingsley
La Grange, Wyoming
|
|
|
|
| Re: [GMCnet] Furnace Issues... [message #166207 is a reply to message #166174] |
Fri, 13 April 2012 00:43 |
 |
John Heslinga
Messages: 632
Registered: February 2011
Location: Edmonton, Alberta, Canada
Karma: 4
|
Senior Member |
|
|
Kelvin:
Mine looked less holey than yours. But it did send th CO. Monitor squealing. I'm really surprised yours did not!! Like everyone said it's time to replace. You can't get parts for yours.
I purchased a new 30000 BTU Suburban from Campers World with a Ducting kit (I could have made the kit for nothing so don't bother buying it as you will see in my write up) It's just a rectangular adaptor.
Here is what I did to replace my furnace
http://www.gmcmhphotos.com/photos/showgallery.php?cat=6020
Follow the entire album for a procedure. The sheet metal work is all done by hand. It's only one way to do it. I've seen others who have just used the side holes with the adaptors that come with it. (may be less work but I had fun doing it my way)
Later I Needed to add two more ducts to the furnace than shown to allow it to flow more air.
Best regards
John and Cathie Heslinga
1974 Canyonlands 260
455, Manny tranny and 1 ton, 3:70 LS,
Red Seal Journeyman, DTE, BEd. MEd.
Edmonton, Alberta
[Updated on: Fri, 13 April 2012 00:53] Report message to a moderator |
|
|
|
|
|
| Re: [GMCnet] Furnace Issues... [message #166221 is a reply to message #166174] |
Fri, 13 April 2012 07:21 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
|
Senior Member |
|
|
I believe I'd get riud of that. Those holes leave a path from the burning gasses into the interior of the coach. Now I have personally >never< seen a hole in anything get smaller. Replace the burner chamber or the fuirnace. That could make you a statistic.
--johnny
'76 transmode norris
'76 palm beach
From: Kelvin Dietz <kelvin@datsuns.com>
To: gmclist@temp.gmcnet.org
Sent: Thursday, April 12, 2012 9:38 PM
Subject: [GMCnet] Furnace Issues...
Hey guys...
I haven't been this far into my "galley" for 7 years and I've never dug
this deep. I have a gas leak (which I did find) but while I was at it I
took some other stuff apart for the first time. Namely the furnace.
So I have holes in the furnace. Not knowing how thing beast really
works I have no idea if these are dangerous or not. Been using it since
2002 and there have been no explosions and I've never has a CO alarm go
off, either.
http://www.gmcmhphotos.com/photos/showfull.php?photo=43844
http://www.gmcmhphotos.com/photos/showfull.php?photo=43843
What say you with more experience? I don't really want to replace a
furnace but should I be running this?
And there's also a valve on top of the furnace to shut off the gas to it.
http://www.gmcmhphotos.com/photos/showfull.php?photo=43845
An OEM thing or something a PO has added? It sure seems an odd thing
since the Fridge and Water heater don't have a shut-off valve but I have
no clue.
Thanks in advance,
Kelvin
'73 23' in Eugene, OR
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
|
|
|
|
| Re: [GMCnet] Furnace Issues... [message #166223 is a reply to message #166174] |
Fri, 13 April 2012 08:33 |
 |
Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
|
Senior Member |
|
|
| Kelvin Dietz wrote on Thu, 12 April 2012 21:38 |
Hey guys...<snip>
So I have holes in the furnace. Not knowing how thing beast really works I have no idea if these are dangerous or not. Been using it since 2002 and there have been no explosions and I've never has a CO alarm go off, either.
<snip>
What say you with more experience? I don't really want to replace a furnace but should I be running this?
And there's also a valve on top of the furnace to shut off the gas to it.
<snip>
An OEM thing or something a PO has added? It sure seems an odd thing since the Fridge and Water heater don't have a shut-off valve but I have no clue.
Thanks in advance,
Kelvin
'73 23' in Eugene, OR
|
Kelvin,
I am very glad that we are not reading about you. That was a very real possibility.
I ran into a similar problem 6 years ago. But, my CO alarm screamed at me (I have this guardian angel that doesn't mind long days and weekend overtime). As we had limited time for our scheduled departure and I knew a lot less than I do now, I purchased a kit from Cinnabar (they are local to me). I would never do it again and I suggest that you do not. What they had was a kit for an SF-30 (way too big for a 23 even at 0°F) with a back plate and extending intake and flue. It fit in the space provided by the removal of the original. It did need a built up base to line up with the holes in the skin and some rework of the ducting.
If I were to do it again, I would get the newer version NT-20SQ (what you have should be an ST-24 - close enough) (maybe even go down to the 16, but I would have to get out my ASRE books) and figure out how to make it fit there or maybe even some where else.
There is an article or an album of how someone adapted the unit to the non-square skin of a GMC without buying Cinnabar's kit. I do not know what will be required to fit the NT version in there, but if you can't figure it out, you can come back here and ask for help.
The new version is vastly smaller. In a 23 you sure can use the extra storage volume. I don't believe it was even offered 6 years ago, but if I had the resources, I might just change it out as the 30k is way too much.
It is also a great upgrade. When you need heat, you turn it on at the thermostat in the back bedroom. (You don't have to grovel in the aisle trying to get the pilot to light.)
If you live someplace with mud dubbers - get the screen. I know what Suburban says about it. Get it any way.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
|
|
|
|
| Re: [GMCnet] Furnace Issues... [message #166228 is a reply to message #166174] |
Fri, 13 April 2012 09:25 |
powerjon
Messages: 2446
Registered: January 2004
Karma: 5
|
Senior Member |
|
|
Kevin,
I am going to be more direct! The furnace is a death trap waiting to
happen get it out NOW! The unit is a Suburban unit and you can get a
direct replacement that will fit without any issues. Suburban may or
may not sell you repair parts, but in the overall scheme of things new
would be cheaper.
JR Wright
GMC Great Laker MHC
GMC Eastern States
GMCMHI
78 Buskirk 30' Stretch
1975 Avion (Under Reconstruction)
Michigan
On Apr 12, 2012, at 9:38 PM, Kelvin Dietz wrote:
> Hey guys...
>
> I haven't been this far into my "galley" for 7 years and I've never
> dug
> this deep. I have a gas leak (which I did find) but while I was at
> it I
> took some other stuff apart for the first time. Namely the furnace.
>
> So I have holes in the furnace. Not knowing how thing beast really
> works I have no idea if these are dangerous or not. Been using it
> since
> 2002 and there have been no explosions and I've never has a CO alarm
> go
> off, either.
>
> http://www.gmcmhphotos.com/photos/showfull.php?photo=43844
> http://www.gmcmhphotos.com/photos/showfull.php?photo=43843
>
> What say you with more experience? I don't really want to replace a
> furnace but should I be running this?
>
> And there's also a valve on top of the furnace to shut off the gas
> to it.
> http://www.gmcmhphotos.com/photos/showfull.php?photo=43845
>
> An OEM thing or something a PO has added? It sure seems an odd thing
> since the Fridge and Water heater don't have a shut-off valve but I
> have
> no clue.
>
> Thanks in advance,
> Kelvin
> '73 23' in Eugene, OR
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
J.R. Wright
GMC GreatLaker
GMC Eastern States
GMCMI
78 30' Buskirk Stretch
75 Avion Under Reconstruction
Michigan
|
|
|
|
| Re: [GMCnet] Furnace Issues... [message #166243 is a reply to message #166184] |
Fri, 13 April 2012 12:16 |
|
mike miller
Messages: 3576
Registered: February 2004
Location: Hillsboro, Oregon
Karma: 0
|
Senior Member |
|
|
| Kelvin Dietz wrote on Thu, 12 April 2012 19:44 |
...
How does this thing work? Isn't it must warm air in most of those
cavities? So if some air gets out why is that a problem?
I understand the manufacturer didn't put holes in there so they can't be
a great thing, but we don't really notice any odd odors and like I said,
the CO alarms have never gone off. Where is the danger? Mostly like
I'll replace the unit but I am curious. ...
|
The propane is burned in one end of this part (the heat exchanger). The exhaust is pumped through the heat exchanger heating the air around it. That warmed air is pumped into your coach.
I have no idea why your CO alarm did not go off. It could be bad or you have way to many air leaks in your coach to heat effectively.
If you have used this furnace in cold weather you are lucky to be alive.
Mike Miller -- Hillsboro, OR -- on the Black list
(#2)`78 23' Birchaven Rear Bath -- (#3)`77 23' Birchaven Side Bath
More Sidekicks than GMC's and a late model Malibu called 'Boo'
http://m000035.blogspot.com
|
|
|
|
| Re: [GMCnet] Furnace Issues... [message #166245 is a reply to message #166243] |
Fri, 13 April 2012 12:40 |
zhagrieb
Messages: 676
Registered: August 2009
Location: Portland Oregon
Karma: 0
|
Senior Member |
|
|
Yep, I said CO-2, not CO. Those holes were so big I must have been thinking about 2 times a much CO. (Can I wiggle around it that way?)
Glenn
Glenn Giere, Portland OR, K7GAG
'73 "Moby the Motorhome" 26'
|
|
|
|
|
|
| Re: [GMCnet] Furnace Issues... [message #166265 is a reply to message #166258] |
Fri, 13 April 2012 14:27 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
|
Senior Member |
|
|
Kelvin, what the CO detectors detect is a concentration of CO in parts per
million, not if there is any CO present. Propane is an extremely clean
burning fuel, particularly in a furnace type combustion chamber. There is a
squirrel cage blower that draws in fresh outside air, then blows it over
the heat exchanger where it warms, and then through the duct system to warm
the interior of the coach. Combustion air is mixed with propane at the
combustion chamber and travels through the inside of the heat exchanger,
and then exits the coach through the exhaust port on the outside wall of
the coach. If the air inside the cabinet of the furnace is at a higher
pressure than the combustion gasses, then in all likelyhood, cabinet air
might be overpressuring the combustion gasses and some of it is exiting the
coach with the exhaust. This is a simple explanation of why your CO
detector did not go off. That being said, if your heat exchanger has holes
in it like the ones in your pictures, it has served a long and useful life
and needs to be replaced. I think that just the heat exhcanger might be
available if you can find it, but as inexpensive as those furnaces are, it
willl be less work if you just replace the whole unit. I put a new one in
my Royale last year, and I got it from RVParts outlet.com
They are in the Beaverton, OR. area. If memory serves me, I paid around
$395.00 for a NT 26 Surburban. I picked it up and saved freight.
Jim Hupy
Salem, OR
78 GMC Royale 403
On Fri, Apr 13, 2012 at 12:07 PM, Kelvin Dietz <kelvin@datsuns.com> wrote:
> On 4/13/2012 10:16 AM, Mike Miller wrote:
> >
> > Kelvin Dietz wrote on Thu, 12 April 2012 19:44
> >> ...
> >> How does this thing work? Isn't it must warm air in most of those
> >> cavities? So if some air gets out why is that a problem?
> >>
> >> I understand the manufacturer didn't put holes in there so they can't be
> >> a great thing, but we don't really notice any odd odors and like I said,
> >> the CO alarms have never gone off. Where is the danger? Mostly like
> >> I'll replace the unit but I am curious. ...
> >
> > The propane is burned in one end of this part (the heat exchanger). The
> exhaust is pumped through the heat exchanger heating the air around it.
> That warmed air is pumped into your coach.
> >
> > I have no idea why your CO alarm did not go off. It could be bad or you
> have way to many air leaks in your coach to heat effectively.
> >
> > If you have used this furnace in cold weather you are lucky to be alive.
>
> CO Alarm is nearly new. It will go off if Onan exhaust gets into the rig.
>
> Would bet those holes have been there a long time. We've used it many
> times in cold weather. It cycles, of course. Maybe if there is CO
> getting out it's not building up enough to set of the alarm.
>
> Dunno. Pulled it out today. FWIW, it is a Suburban NT-22. N I'll be
> installing a new one at some point. Never need it during the summer, of
> course. The unit Matt Cole suggested looks good. (NT-20SQ) I'll take
> pictures.
>
> Thanks for all the advice.
> Kelvin
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
|
|
|
| Re: [GMCnet] Furnace Issues... [message #166270 is a reply to message #166265] |
Fri, 13 April 2012 15:43 |
idrob
Messages: 645
Registered: January 2005
Location: Central Idaho
Karma: 0
|
Senior Member |
|
|
| James Hupy wrote on Fri, 13 April 2012 12:27 |
Kelvin, what the CO detectors detect is a concentration of CO in parts per
million, not if there is any CO present. Propane is an extremely clean
burning fuel, particularly in a furnace type combustion chamber. There is a
squirrel cage blower that draws in fresh outside air, then blows it over
the heat exchanger where it warms, and then through the duct system to warm
the interior of the coach. Combustion air is mixed with propane at the
combustion chamber and travels through the inside of the heat exchanger,
and then exits the coach through the exhaust port on the outside wall of
the coach. If the air inside the cabinet of the furnace is at a higher
pressure than the combustion gasses, then in all likelyhood, cabinet air
might be overpressuring the combustion gasses and some of it is exiting the
coach with the exhaust. This is a simple explanation of why your CO
detector did not go off.
Jim Hupy
Salem, OR
78 GMC Royale 403
|
Jim: I hate to contradict you but that explanation of how the furnace works is not quite right. There are two air paths, the heat blower takes air from inside (not outside) the coach and blows it over the outside of the combustion chamber. There is a second blower wheel (on the same motor shaft) that takes outside air and forces it through the combustion chamber where the gas is admitted to the burner. The air from that sealed combustion path is then exhausted outsied. Now, if there is just the right amount of air for the gas to fully burn there is very little carbon monoxide produced, only carbon dioxide and water vapor. But if there is not enough oxygen (and this is fairly common) both carbon monoxide (the bad stuff) and carbon dioxide (the somewhat ok stuff) is produced. The holes in the combustion chamber shown in the photo certainly let whatever is being produced into the heated air and circulated into the coach.
The furnace does need to be replaced at any rate, it is too dangerous as it is.
Rob Allen
former owner of '76 x-PB
|
|
|
|
| Re: [GMCnet] Furnace Issues... [message #166274 is a reply to message #166228] |
Fri, 13 April 2012 18:14 |
mickeysss
Messages: 1476
Registered: January 2012
Karma: 0
|
Senior Member |
|
|
how do you put a red arrow on your picture?
off to never land sorry, but same picture, my po took the heater out on my palm beach
he put a radiant heater in the wall, lpg, i hope it won't kill me. catalytic one. 2 foot squaRE.
On Apr 13, 2012, at 7:25 AM, John Wright wrote:
> Kevin,
> I am going to be more direct! The furnace is a death trap waiting to
> happen get it out NOW! The unit is a Suburban unit and you can get a
> direct replacement that will fit without any issues. Suburban may or
> may not sell you repair parts, but in the overall scheme of things new
> would be cheaper.
>
> JR Wright
> GMC Great Laker MHC
> GMC Eastern States
> GMCMHI
> 78 Buskirk 30' Stretch
> 1975 Avion (Under Reconstruction)
> Michigan
>
> On Apr 12, 2012, at 9:38 PM, Kelvin Dietz wrote:
>
>> Hey guys...
>>
>> I haven't been this far into my "galley" for 7 years and I've never
>> dug
>> this deep. I have a gas leak (which I did find) but while I was at
>> it I
>> took some other stuff apart for the first time. Namely the furnace.
>>
>> So I have holes in the furnace. Not knowing how thing beast really
>> works I have no idea if these are dangerous or not. Been using it
>> since
>> 2002 and there have been no explosions and I've never has a CO alarm
>> go
>> off, either.
>>
>> http://www.gmcmhphotos.com/photos/showfull.php?photo=43844
>> http://www.gmcmhphotos.com/photos/showfull.php?photo=43843
>>
>> What say you with more experience? I don't really want to replace a
>> furnace but should I be running this?
>>
>> And there's also a valve on top of the furnace to shut off the gas
>> to it.
>> http://www.gmcmhphotos.com/photos/showfull.php?photo=43845
>>
>> An OEM thing or something a PO has added? It sure seems an odd thing
>> since the Fridge and Water heater don't have a shut-off valve but I
>> have
>> no clue.
>>
>> Thanks in advance,
>> Kelvin
>> '73 23' in Eugene, OR
>>
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
|
|
|
|
|
Goto Forum:
Current Time: Tue Oct 08 06:44:11 CDT 2024
Total time taken to generate the page: 0.00947 seconds
|
GMCforum
Search
Help
Register
Login
Home
